Open-circuit voltage testing device

Abstract

The utility model provides an open-circuit voltage testing device. The open-circuit voltage testing device provided by the utility model comprises a base, a lifting device, a lifting platform, a testing line, a testing needle and a connecting block made of a bakelite plate material, the first end of the lifting device is arranged on the base, and the second end of the lifting device is connected with the first face of the lifting platform. The connecting block is arranged on the first face of the lifting platform, a first through hole extending from the first face of the connecting block to the second face of the connecting block is formed in the connecting block, the first end of the testing line is arranged in the first through hole and connected with the first end of the testing needle, and the second end of the testing line is exposed out of the first face of the connecting block. The second end of the test pin is exposed out of the second surface of the connection block. The connecting block for bearing the test pin and the test wire is made of an insulated bakelite plate material, so that when an open-circuit voltage test is carried out, electromagnetic induction caused by electrification of the test pin and the test wire is avoided, the test precision is not influenced, and the accuracy of the open-circuit voltage test is ensured.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, in particular to an open circuit voltage testing device. Background Art

[0002] A lithium-ion battery is a rechargeable battery. Most of the power sources of electronic devices such as mobile phones and laptop computers used in daily life are lithium-ion batteries. In order to ensure the power supply performance and battery safety performance of electronic products, it is necessary to detect the performance of the battery cells inside before the lithium-ion batteries leave the factory. For example, OCV testing. OCV is the abbreviation of "open circuit voltage". The open circuit voltage refers to the voltage measured during the process of the battery current returning to zero after continuous charge and discharge in the charging or discharging state. The open circuit voltage directly reflects the state of the chemical reaction in the battery. Therefore, the open circuit voltage test has become an important method to measure the battery health status. In the existing open circuit voltage testing devices, the carriers of the test needles are mostly made of metal materials. During the testing process, electric current will generate a current magnetic field, which affects the testing accuracy. Content of the Utility Model

[0003] The purpose of the utility model is to provide an open circuit voltage testing device to solve the technical problem that the existing open circuit voltage testing device will generate a current magnetic field during the testing process, which affects the testing accuracy.

[0004] The technical solution of the utility model is as follows. An open circuit voltage testing device is provided, which includes a base, a lifting device, a lifting platform, a test wire, a test needle, and a connecting block made of bakelite.

[0005] The first end of the lifting device is arranged on the base, and the second end of the lifting device is connected to the first surface of the lifting platform; the connecting block is arranged on the first surface of the lifting platform. A first through hole extending from the first surface of the connecting block to the second surface of the connecting block is provided on the connecting block. The first end of the test wire is arranged inside the first through hole and the first end of the test wire is connected to the first end of the test needle. The second end of the test wire is exposed on the first surface of the connecting block, and the second end of the test needle is exposed on the second surface of the connecting block.

[0006] Preferably, the lifting device includes a cylinder and a piston assembly. The cylinder is arranged on the base, the first end of the piston assembly is arranged inside the cylinder, and the second end of the piston assembly is arranged on the first surface of the lifting platform.

[0007] Preferably, the base includes a plurality of first support plates, a plurality of second support plates and a plurality of support columns. The support columns are vertically arranged between the first support plate and the second support plate. The first end of the cylinder is arranged on the first support plate, and the second end of the cylinder is connected to the second support plate. The second support plate is provided with a second through hole, and the piston assembly passes through the second through hole. The number of the first support plates is the same as that of the second support plates.

[0008] Preferably, a chute is provided on the first surface of the lifting platform, and a sliding plate is provided on the first surface of the connecting block. The connecting block is slidably arranged on the first surface of the lifting platform through the sliding plate and the chute.

[0009] Preferably, a scale is provided on the second surface of the lifting platform.

[0010] Preferably, the lifting platform includes a frame structure. The frame structure includes a parallel first frame and a second frame. The number of the connecting blocks is 2, and the first surface of the connecting block is connected to the first surface of the first frame and the first surface of the second frame.

[0011] Preferably, the first through hole is arranged at a position on the connecting block that does not contact the first frame and the second frame.

[0012] Preferably, the test probe is a spring test probe.

[0013] Preferably, the number of the bases is 4, and the number of the corresponding lifting devices is 4.

[0014] Preferably, the number of the first through holes, the test wires and the test probes is multiple, and the number of the first through holes, the test wires and the test probes is the same.

[0015] The beneficial effect of the present utility model is that the connecting block carrying the test probe and the test wire is made of insulating bakelite material. When performing an open-circuit voltage test, electromagnetic induction will not be generated due to the energization of the test probe and the test wire, thereby affecting the test accuracy and ensuring the accuracy of the open-circuit voltage test. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of an open-circuit voltage test device according to an embodiment of the present utility model.

[0017] Reference Numerals: 10 - Base; 11 - First Support Plate; 12 - Support Column; 13 - Second Support Plate; 20 - Lifting Device; 21 - Piston Assembly; 22 - Cylinder; 30 - Lifting Platform; 31 - First Frame; 32 - Second Frame; 40 - Test Wire; 50 - Test Probe; 60 - Connecting Block; 61 - First Through Hole. Detailed Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0019] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present utility model. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] Figure 1 is a schematic structural diagram of an open-circuit voltage test device according to an embodiment of the present utility model. It should be noted that if there are substantially the same results, the embodiments of the present utility model are not limited to Figure 1 the structure shown. As Figure 1 shown, the open-circuit voltage test device includes a base 10, a lifting device 20, a lifting platform 30, a test wire 40, a test needle 50, and a connecting block 60 made of bakelite;

[0021] The first end of the lifting device 20 is provided on the base 10, and the second end of the lifting device 20 is connected to the first surface of the lifting platform 30; the connecting block 60 is disposed on the first surface of the lifting platform 30, and a first through hole 61 extending from the first surface of the connecting block 60 to the second surface of the connecting block 60 is provided on the connecting block 60. The first end of the test wire 40 is disposed inside the first through hole 61 and the first end of the test wire 40 is connected to the first end of the test needle 50. The second end of the test wire 40 is exposed on the first surface of the connecting block 60, and the second end of the test needle 50 is exposed on the second surface of the connecting block 60.

[0022] In this embodiment, the battery to be tested is placed below the lifting platform 30, and the height of the lifting platform 30 is adjusted by the lifting device 20 so that the test needle 50 exposed on the second surface of the connecting block 60 contacts the pole of the battery to be tested for open-circuit voltage test. The test data is transmitted to an external tester through the test wire 40 connected to the first end of the test needle 50. The connecting block 60 carrying the test needle 50 and the test wire 40 is made of insulating bakelite material. During the open-circuit voltage test, electromagnetic induction will not be generated due to the energization of the test needle 50 and the test wire 40, thus affecting the test accuracy and ensuring the accuracy of the open-circuit voltage test.

[0023] Bakelite board, also known as phenolic laminated cardboard, is made of high-quality bleached wood-based paper and cotton linter paper as reinforcements, and phenolic resin, which is made by reacting high-purity, fully synthetic petrochemical raw materials, as the resin binder. Compared with an iron metal block of the same volume, the bakelite board can provide a greater insulating effect.

[0024] In some embodiments, such as Figure 1 shown, the lifting device 20 includes a cylinder 22 and a piston assembly 21. The cylinder 22 is disposed on the base 10. The first end of the piston assembly 21 is disposed inside the cylinder 22, and the second end of the piston assembly 21 is disposed on the first surface of the lifting platform 30.

[0025] In this embodiment, the lifting device 20 includes a cylinder 22 and a piston assembly 21. The first end of the piston assembly 21, that is, the piston, is disposed inside the cylinder 22, and the second end of the piston assembly 21, that is, the end of the piston rod away from the piston, is disposed at the lower end of the lifting platform 30. Through the mutual cooperation of the cylinder 22 and the piston assembly 21, the lifting of the lifting platform 30 can be realized.

[0026] In some embodiments, such as Figure 1 shown, the base 10 includes a plurality of first support plates 11, a plurality of second support plates 13, and a plurality of support columns 12. The support columns 12 are vertically disposed between the first support plates 11 and the second support plates 13. The first end of the cylinder 22 is disposed on the first support plate 11, and the second end of the cylinder 22 is connected to the second support plate 13. A second through hole is provided on the second support plate 13, and the piston assembly 21 passes through the second through hole. The number of the first support plates 11 and the second support plates 13 is the same.

[0027] In this embodiment, the first support plate 11 and the second support plate 13 are fixed by a plurality of support columns 12, so that the base 10 becomes a stable structure. The cylinder 22 itself is made of a metal material with relatively high strength, which can make the structure of the base 10 more stable. The second through hole provided on the second support plate 13 can allow the piston rod in the piston assembly 21 to pass through, ensuring the normal operation of the cylinder 22 and the piston assembly 21 without affecting the overall structural strength of the base 10.

[0028] In some embodiments, a sliding groove is provided on the first surface of the lifting platform 30, and a sliding plate is provided on the first surface of the connecting block 60. The connecting block 60 is slidably disposed on the first surface of the lifting platform 30 through the sliding plate and the sliding groove.

[0029] In this embodiment, the connecting block 60 can slide on the first connecting block 60 through the sliding plate and the sliding groove, driving the test pin 50 to slide. In practical applications, the position of the connecting block 60 can be adjusted according to different situations to test batteries of different sizes, with higher applicability.

[0030] In some embodiments, as Figure 1 shown, a scale is provided on the second surface of the lifting platform 30.

[0031] In this embodiment, the second surface of the lifting platform 30 refers to the surface of the lifting platform 30 that is perpendicular to the first surface of the lifting platform 30. A scale is provided on the second surface of the lifting platform 30. When the connecting block 60 slides on the lifting platform 30, it can slide precisely according to the scale of the scale to achieve the purpose of accurately adjusting the position of the connecting block 60.

[0032] In some embodiments, as Figure 1 shown, the lifting platform 30 includes a frame structure. The frame structure includes parallel first side frames 31 and second side frames 32. The number of connecting blocks 60 is 2, and the first surface of the connecting block 60 connects the first surface of the first side frame 31 and the first surface of the second side frame 32.

[0033] In this embodiment, both ends of the first surface of the connecting block 60 are respectively connected to the first surface of the first side frame 31 and the first surface of the second side frame 32, that is, only a part of the first surface of the connecting block 60 is in contact with the first side frame 31 and the second side frame 32. The number of connecting blocks 60 is 2. Setting 2 connecting blocks 60 can obtain a more abundant distribution scheme of the test pins 50, and can test multiple batteries to be tested simultaneously, improving the test efficiency.

[0034] In some embodiments, as Figure 1 shown, the first through hole 61 is provided at a position on the connecting block 60 that is not in contact with the first side frame 31 and the second side frame 32.

[0035] In this embodiment, the first through hole 61 is provided at a position on the connecting block 60 that is not in contact with the first side frame 31 and the second side frame 32, facilitating the routing of the test wire 40 arranged in the first through hole 61.

[0036] In some embodiments, the test pin 50 is a spring test pin.

[0037] In this embodiment, the spring in the spring test pin can play a buffering role when contacting the pole column of the battery to be tested, preventing rigid contact between the test pin 50 and the pole column of the battery to be tested, and extending the service life of the test pin 50.

[0038] In some embodiments, as Figure 1As shown, the number of the bases 10 is 4, and correspondingly, the number of the lifting devices 20 is 4.

[0039] In this embodiment, setting 4 bases 10 can improve the structural stability of the open-circuit voltage testing device in this embodiment, and each base 10 corresponding to 1 lifting device 20 can improve the synchronism and efficiency when adjusting the height of the lifting platform 30.

[0040] In some embodiments, as Figure 1 shown, the numbers of the first through holes 61, the test lines 40, and the test needles 50 are all multiple, and the numbers of the first through holes 61, the test lines 40, and the test needles 50 are the same.

[0041] In this embodiment, by setting multiple test needles 50 and multiple test lines 40, a richer distribution scheme of the test needles 50 can be obtained, so as to realize testing and recording multiple batteries to be tested simultaneously, effectively improving the test efficiency.

[0042] The beneficial effects of the present utility model are as follows: The battery to be tested is placed below the lifting platform 30. The height of the lifting platform 30 is adjusted by the lifting device 20 so that the test needles 50 exposed on the second surface of the connecting block 60 are in contact with the electrode posts of the battery to be tested for OCV testing. The test data is transmitted to an external tester through the test lines 40 connected to the first ends of the test needles 50. The connecting block 60 carrying the test needles 50 and the test lines 40 is made of insulating bakelite material. During OCV testing, electromagnetic induction will not be generated due to energization, thereby affecting the test accuracy and ensuring the accuracy of OCV testing.

[0043] The above are only the implementation manners of the embodiments of the present utility model. It should be noted here that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, improvements can still be made, but these all belong to the protection scope of the present utility model.

Claims

1. An open circuit voltage test device, characterized in that: Including a base, a lifting device, a lifting platform, a test line, a test needle and a connection block made of bakelite; The first end of the lifting device is arranged on the base, and the second end of the lifting device is connected to the first surface of the lifting platform; the connecting block is arranged on the first surface of the lifting platform, and the connecting block is provided with a first through hole extending from the first surface of the connecting block to the second surface of the connecting block, the first end of the test line is arranged inside the first through hole and the first end of the test line is connected to the first end of the test needle, the second end of the test line is exposed at the first surface of the connecting block, and the second end of the test needle is exposed at the second surface of the connecting block.

2. The open circuit voltage test device according to claim 1, characterized in that: The lifting device comprises a cylinder and a piston assembly, wherein the cylinder is arranged on the base, the first end of the piston assembly is arranged inside the cylinder, and the second end of the piston assembly is arranged on the first surface of the lifting platform.

3. The open circuit voltage test device according to claim 2, characterized in that: The base includes a plurality of first support plates, a plurality of second support plates and a plurality of support columns, wherein the support columns are vertically arranged between the first support plates and the second support plates; the first end of the cylinder is arranged on the first support plate, and the second end of the cylinder is connected to the second support plate; a second through hole is arranged on the second support plate, and the piston assembly is passed through the second through hole; the number of the first support plates and the second support plates is the same.

4. The open circuit voltage test device according to claim 1, characterized in that: A slide groove is provided on the first surface of the lifting platform, a sliding plate is provided on the first surface of the connecting block, and the connecting block is slidably arranged on the first surface of the lifting platform through the sliding plate and the slide groove.

5. The open circuit voltage test device according to claim 4, characterized in that: A scale is provided on the second surface of the lifting platform.

6. The open circuit voltage test device according to claim 1, characterized in that: The lifting platform includes a frame structure, the frame structure includes a first frame and a second frame that are parallel, the number of the connecting blocks is 2, and the first surface of the connecting block connects the first surface of the first frame and the first surface of the second frame.

7. The open circuit voltage test device according to claim 6, characterized in that: The first through hole is disposed at a position on the connection block that is not in contact with the first frame and the second frame.

8. The open circuit voltage test device according to claim 1, characterized in that: The test needle is a spring test needle.

9. The open circuit voltage test device according to claim 1, characterized in that: The number of the bases is 4, and the number of the corresponding lifting devices is 4.

10. The open circuit voltage test device according to claim 1, characterized in that: The number of the first through hole, the test line and the test needle are all multiple, and the number of the first through hole, the test line and the test needle are consistent.

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